/* PSPP - a program for statistical analysis.
- Copyright (C) 2007, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
struct casereader;
struct subcase;
-struct merge *merge_create (const struct subcase *, const struct caseproto *);
+typedef struct ccase *merge_distinct_combine_func (struct ccase *first,
+ struct ccase *second,
+ void *aux);
+
+struct merge *merge_create (const struct subcase *, const struct caseproto *,
+ merge_distinct_combine_func *, void *aux);
void merge_destroy (struct merge *);
void merge_append (struct merge *, struct casereader *);
struct casereader *merge_make_reader (struct merge *);